<?php

declare(strict_types=1);

namespace App\FormBuilder\Purposes\Resolvers;

use App\FormBuilder\Purposes\PurposeSubjectResolver;
use App\Models\FormBuilder\FormSubmission;
use App\Models\Person;
use App\Models\User;
use Illuminate\Database\Eloquent\Model;

/**
 * RFC §3 Q9 — incident_report: subject is Person via auth when present;
 * null when anonymous (the only purpose that may legitimately resolve
 * to no subject).
 */
final readonly class IncidentReportSubjectResolver implements PurposeSubjectResolver
{
    public function resolveOrProvision(FormSubmission $submission): ?Model
    {
        if ($submission->subject_type === 'person' && $submission->subject_id !== null) {
            $subject = $submission->subject;
            if ($subject instanceof Person) {
                return $subject;
            }
        }

        if ($submission->submitted_by_user_id === null) {
            // Anonymous-allowed: caller (FormBindingApplicator) handles
            // the null subject path explicitly.
            return null;
        }

        $user = User::query()->find($submission->submitted_by_user_id);
        if (! $user instanceof User) {
            return null;
        }

        return Person::query()
            ->withoutGlobalScopes()
            ->where('user_id', $user->id)
            ->where('event_id', $submission->event_id)
            ->first();
    }
}